This question already has an answer here:
Back in the day, my friends and I derived much amusement from the kanji that is read 「たいと」, which consists of three 雲 and three 龍:
What actual purpose did this kanji serve? The Japanese Wikipedia article for it says:
But the fact that this says 用いられたとされる suggests to me that this is somehow vague, unclear, or disputed.
(Personally, it strikes me as an almost comical kanji, and I can't imagine anybody using it seriously.)